import java.util.List;

public class Main {
    public static void main(String[] args) {
        Solution solution = new Solution();
        String[] s = new String[]{"","b"};
        List<List<String>> list =  solution.groupAnagrams(s);
        for(List list1 : list) {
            System.out.println(list1);
        }
        /*String s ="avc";
        String s1 = "cva";
        char[] a = s.toCharArray();
        char[] b = s1.toCharArray();
        System.out.println(a.equals(b));*/
    }
}
